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Passive MIMO radar multi-target positioning method based on DBSCAN

A multi-target positioning and target technology, applied in the field of passive MIMO radar multi-target positioning, can solve problems such as strong concealment, and achieve the effect of simple method and good effect

Active Publication Date: 2020-06-30
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

The passive radar system has a very strong concealment because it only has a receiver and does not emit signals itself, but relies on external radiation sources for target detection.

Method used

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  • Passive MIMO radar multi-target positioning method based on DBSCAN
  • Passive MIMO radar multi-target positioning method based on DBSCAN
  • Passive MIMO radar multi-target positioning method based on DBSCAN

Examples

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Embodiment Construction

[0036] The present invention is described in detail below in conjunction with embodiment:

[0037] In this example, Matlab is used to verify the above DBSCAN-based passive MIMO multi-target positioning method using time delay measurements. For the sake of simplicity, the following assumptions are made for the algorithm model:

[0038] 1. The transmitting station, receiving station and target are all in the XY plane;

[0039] 2. All engineering errors are added to the distance error;

[0040] 3. Assume that the target is stationary or moving at a very low speed.

[0041] Assuming that the target area is a square area of ​​100km×100km, Monte Carlo simulations are performed 500 times, and the coordinates of the four targets are (50.1,10), (70.4,55), (70.4,56) and (30.1,60), the unit for km. Among them, the distance between target 2 and target 3 is only 1km. The transmitting station and receiving station are evenly distributed on the circle whose center is (50, 10) and the rad...

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Abstract

The invention belongs to the technical field of electronic countermeasure, and particularly relates to a DBSCAN-based passive MIMO multi-target positioning method by using a time delay measurement value. According to the method, a multi-target data association algorithm is mainly adopted, time delay information measured by a plurality of receiving stations is converted into distance sums, and association is carried out to obtain a cost matrix C (k, j). Firstly, data preprocessing is carried out, data larger than a threshold value in a cost matrix are removed, then cluster division is carried out through a DBSCAN clustering algorithm, and finally weighted fusion is carried out on different clusters to obtain position estimation of multiple targets. The method has the beneficial effects thatthe MIMO multi-target data can be accurately associated, the position of the target can be finally and accurately estimated, the method is simple, and the effect is good.

Description

technical field [0001] The invention belongs to the technical field of electronic countermeasures, and relates to a DBSCAN-based passive MIMO radar multi-target positioning method. Background technique [0002] Multiple Input Multiple Output (MIMO) radar is proposed on the basis of MIMO communication technology, and has caused very extensive research and application since it was proposed. MIMO radar can be divided into two categories according to the distribution of radar array elements. One is the centralized MIMO radar with relatively mature research, which is relatively close to the traditional phased radar; the other is the statistical MIMO radar with large intervals between the transmitting and receiving array elements, which can use space diversity to counter the target radar scattering cross section flickering. The passive radar system has a very strong concealment because it only has a receiver and does not emit signals itself, but relies on external radiation sour...

Claims

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Application Information

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IPC IPC(8): G01S7/41G01S13/06G01S7/36G06K9/62
CPCG01S13/06G01S7/418G01S7/36G06F18/2321
Inventor 李万春王丽邹炜钦廖红舒
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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